MoI memory limit?

 From:  wastzzz
6180.1 
Hi, I know that MoI is 32-bit, and have no particular problems with that.
I am about to start a very detailed architectural project in MoI.
Just, it would be useful to know how much memory does a certain scene use, like some sort of counter, to avoid reaching the limit and possible crashes.
Am I wrong?
Thanks,
Max.